| Laveno-Mombello to Olympia Heights (Florida) | 4,915.84 mi (7,911.29 km) |
| Laveno-Mombello to Omaha (Nebraska) | 4,840.00 mi (7,789.22 km) |
| Laveno-Mombello to On Top of the World Designated Place (Florida) | 4,846.12 mi (7,799.08 km) |
| Laveno-Mombello to Onalaska (Wisconsin) | 4,535.91 mi (7,299.83 km) |
| Laveno-Mombello to Oneida (New York) | 3,954.67 mi (6,364.42 km) |
| Laveno-Mombello to Oneonta (New York) | 3,954.22 mi (6,363.70 km) |
| Laveno-Mombello to Ontario (California) | 5,975.61 mi (9,616.81 km) |
| Laveno-Mombello to Ontario (Oregon) | 5,389.12 mi (8,672.95 km) |
| Laveno-Mombello to Opa-locka (Florida) | 4,903.79 mi (7,891.89 km) |
| Laveno-Mombello to Opelika (Alabama) | 4,816.48 mi (7,751.37 km) |
| Laveno-Mombello to Opelousas (Louisiana) | 5,203.78 mi (8,374.67 km) |
| Laveno-Mombello to Orange (California) | 5,996.00 mi (9,649.64 km) |
| Laveno-Mombello to Orange (Texas) | 5,293.94 mi (8,519.77 km) |
| Laveno-Mombello to Orange City (Florida) | 4,809.35 mi (7,739.90 km) |
| Laveno-Mombello to Orangeburg (South Carolina) | 4,582.67 mi (7,375.09 km) |
